This needs clarification!! How do you use that? I don't even look at the sys map until after FSSing so how can the blank sys map be used for anything (genuinely curious here).
In my opinion, based on what I read in the discussions about the FSS/ADS, most of the discussions are at the core about what the player considers the result of "exploration".
For some it is the system map. Anything in addition is just credits or materials. For those the FSS is good as ist hides the system map (not the information about the system) until the player has done something.
For some the system map is the starting point and not the result. They used the system map as a starting point to "explore" the system. For them the ADS was exactly what they needed. It provided some information, but most of the finder details about the objects where only obtainable by doing something in that system.
Sadly it appears that those two mindsets about exploration are mutually exclusive. At its core the whole controversy is just about the question if the system map is the start or the end of exploring the system. In my opinion, from what I've read, how I understand it …